EP 0866057 A3 20020814 - Process for the preparation of isocyanates of light colour
Title (en)
Process for the preparation of isocyanates of light colour
Title (de)
Verfahren zur Herstellung von Isocyanaten mit heller Farbe
Title (fr)
Procédé pour la préparation d'isocyanates de couleur claire
Publication
Application
Priority
DE 19711447 A 19970319
Abstract (en)
[origin: EP0866057A2] Isocyanates (I) having a light colour are produced by reacting an amine with phosgene, the amine being pre-treated with solid inorganic substances (II) containing Lewis acid and/or Bronsted acid centres prior to mixing. Also claimed is a polyurethane prepared from (I).
IPC 1-7
IPC 8 full level
C07C 263/10 (2006.01); C07C 265/14 (2006.01); C08G 18/76 (2006.01)
CPC (source: EP US)
C07C 263/10 (2013.01 - EP US); C08G 18/7657 (2013.01 - EP US)
C-Set (source: EP US)
Citation (search report)
- [YD] EP 0546398 A2 19930616 - MILES INC [US]
- [Y] US 4039580 A 19770802 - FRULLA FLORO F, et al
- [A] US 5321159 A 19940614 - LAI JOHN T [US], et al
- [A] US 4737243 A 19880412 - SIML ROBERT J [US], et al
- [A] DATABASE CAPLUS [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; XP002202610, retrieved from STN Database accession no. 1995:584473 & JP H0782230 A 19950328 - NIPPON POLYURETHANE KOGYO KK
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0866057 A2 19980923; EP 0866057 A3 20020814; CA 2229835 A1 19980919; CN 1070475 C 20010905; CN 1197793 A 19981104; DE 19711447 A1 19980924; JP H10306068 A 19981117; KR 19980080409 A 19981125; US 5872278 A 19990216
DOCDB simple family (application)
EP 98103997 A 19980306; CA 2229835 A 19980318; CN 98108727 A 19980319; DE 19711447 A 19970319; JP 7019498 A 19980319; KR 19980009193 A 19980318; US 4067398 A 19980318